no, actually this is quite better than your first attempt for an intermediate tile. You just need quite a few variations, not the same thing like
AAAAABCCCCC
AAAABBCCCCC
AAAABABACCC
AAAABCCCCC
this won't look very good if A is white, B is half white half brick and C is brick.
Also, don't be afraid to make a few intermediate tiles that are two tiles wide or even 4 in a square.